APA (7th ed.) Citation

Beer, S. H., Ulam, A. B., Spiro, H. J., Eckstein, H., & Wahl, N. (1962). Patterns of government: The major political systems of Europe (2a. ed.). Random House.

Chicago Style (17th ed.) Citation

Beer, Samuel H., Adam B. Ulam, Herbert J. Spiro, Harry Eckstein, and Nicholas Wahl. Patterns of Government: The Major Political Systems of Europe. 2a. ed. Nueva York: Random House, 1962.

MLA (9th ed.) Citation

Beer, Samuel H., et al. Patterns of Government: The Major Political Systems of Europe. 2a. ed. Random House, 1962.